The mobile cameras you have been seeing at locations throughout the downtown are traffic monitoring equipment. The cameras were collecting vehicle and pedestrian data for a traffic simulation model. The data will be used to analyze the impact of the west - southeast LRT line as it crosses through downtown.
The data collection was focused on downtown parking - specifically, the time, location and number of vehicles using various parking lots. The model also uses pedestrian counts to analyze vehicle delays due to pedestrians crossing the access to the alley.
These cameras are most commonly used to collect traffic data at intersections for the purpose of improving signal timings. However, they can be used for a variety of studies including pedestrian and bicycle usage of multi-use trails and bike lanes.